This is just a Step-by-step guide for those who have difficulty in comprehension and 0 computer skills or just lazy to read Int HoN's forum.
Feel free to ask any questions if you're stuck.
PS: Fully illustrated guide yaw.
PART 1- BASIC SETUP
1. Download and extract HoN Mod Manager.
2. Download Macro Assist Mod.
Make sure it's this file.
3. Place macroassist.honmod file into <directory>\HoN\games\mods
4. Run HoN Mod Manager.
PS: You will require .NET Framework 2.0 to run.
It'll pop out a message like this. Ignore it and press OK.
If your HoN is installed at other directory than the default one, it'll prompt to select HoN's directory.
5. Select & Apply Macro Assist Mod.